Motor-drive for calculating-machines.



0. THIEME.

MOTOR DRIVE POR CALCULATING MACHINES.

APPLICATION FILED AUG. 7, 1911.

' Patented Dec. 17,1912

UNITED STATES PATENT OFFICE.

OTTO THIEME, F ST. LOUIS, MISSOURI, ASSIGNOR TO MOON-HOPKINSy BILLING MACHINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

Moron-DRIVE Fon oALcULATr'Ne-MACHINES.

Specication of Letters atent.

Application iled August 7, 1911. Serial No. 642,889.-

for Calculating-Machines, of whichthe following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains tov make and use the same, reference being had to the accompanying drawings, forming part of this specification, in whicl1,- j

Figure 1 is a sectional view through my improved motor drive for calculating machines or the like. Fig. 2 is a sectional view on line 2-2`Fig. 1. Fig. 3 is a detail sectional view on line 3 3 Fig.. 1. Fig. 4 is a plan view of one of the driven clutch members.

This invention relates to a new and useful improvement in motor drives for calculating machines or the like, the object being to construct a device of the character described which is simple, cheap and effective, the purpose of my present improvement being to provide means whereby when the machine becomes locked, the motor can continue running without breaking any of the parts.

In the drawings, 1 indicates an armature shaft, which is journaled in suitable bearings in a casing 2, and which carries a reducing worm 3, meshing with a worm gear 4. This worm gea'r 4 is mounted upon a sleeve 4a, journaled on a shaft 5 mounted in the housing 2, preferably at right angles to shaft 1, and on one face thereof carries a plate 4b havingradially disposed grooves 4c in its outer face to constitute one member of a friction clutch', of which a disk 6, keyed to sleeve 4a so as to slide thereupon, .is the other member. This disk 6 is provided with radial projections 6, equaling in number the rooves 4, and when the parts are in driving connection, these projections iit in the grooves and consequently the worm gear 4 `becomes locked to the disk 6to drive the same.

7 is a spider plate, made of spring metal, whose legs engage the disk 6, and which spider plate is strung on sleeve 4 and held the machine.

movement thereon. 'This clutch member 9 is moved toward itsfc'o'mpanion. clutch member by means of a spring` 10. The clutch member 9 has a cam faced projection 11, which coperates with .a control bar 12, which bar is `lifted by the motor key 'of leasel the projection 11, theclutch 9 is moved toward its companion member, and when an engagement` is effected, locks the shaft into driving engagement with the When bar 12 is lifted to re- Patente-dominion.

gear 4. Shaft 5 carries'a crank arm 13 at its end, which is connected by a suitable link 14 to the main operating shaft of the machine. In the event that the machine be comes locked, sovthat the crank 13 is prevented from' rotating or continuing to rotate after starting, the form of friction grooves 4c permits the radial ribs 6a to be disengaged therefrom, and consequently, the worm gear 4 may continue to rotate, ,but the friction disk 6 will remain stationary.

lInthe drawings, I have also shown means foroperating a carriage return mechanism 'from the constantly running motor, and this means comprises a sleeve 15 fixed to they gear 4, and on whose outer end is fixed a' disk 16, said disk having radial projections 168L like those heretofore described.

1'( indicates a gear wheel havingradial grooves 17L in its face, to ooperate with the radial projection 16a. 'This gear wheel is loosely mounted on the sleeve extension 15` and held against the disk16 by means of a dish-shaped spider plate spring 18, as shown. Nuts 19 hold the spider plate in operative position. Gear 17 drives a gear 20, which in turn meshes with a pinion 21, conjoined to a bevel gear 23 on the lower end of a shaft 24. Shaft'24` is intended to coperatewithcarriage return mechanism not herein shown, as the same forms no part of my present invention. Suiiice it to say, however, if the carriage is prevented from turning for any cause, so that'shaft 24 is arrested in its rota` tion, the friction clutch interposed between the worm gear 4 and the carriage returning mechanism, will permit said worm gear to continue its rotation while-the carriage return gear remains stationary.

What I claim is- 1. In adevice of the class described, a driving shaft, a driven shaft, sleeves on said shafts, a driving wheel loosely mounted on the sleeve on the driving shaft, a friction plateithereon, a friction disk keyed on said sleeve to rotate therewith and longitudinally adjustable thereon, a spring member carried by said sleeve and adjustable longitudinally thereon and adapted to force said disk into engagement with said frictionplate, and co-' v operating clutch members on said sleeves.

2. A motor drive for calculatingmachines comprising an armature Shaft, a driving sleeve, a driven sleeve, means connected to `said driven sleeve for operating a main shaft, a driving wheel adapted to be driven from the-armature shaft loosely mounted upon the driving sleeve, a friction plate carried by said driving wheel, a friction disk keyed to rotate with the driving sleeve and longitudinally adjustable thereon, tension means for forcing said disk into engagement with said friction plate whereby to lock said drivi Wheel to said driving sleeve, a second friction disk fixedly mounted upon said driving sleeve, a gear Wheel for operating the shaft'of the carriage return mechanism loosely mounted upon said driving sleeve and provided with a friction face, adjustable tension means for forcing said gear wheel into engagement with said second friction disk whereby to lock said gear wheel upon said driving sleeve, and cooperating clutch members on the driving sleeve and the driven sleeve.

3.v In a motor drive for calculating machines, an armature shaft, a driven shaft for operating the machine, a slidable clutch member on said driven shaft, a sleeve, a

driving wheel loosely mounted on saidA sleeve, a second sleeve fixed to said driving wheel, a carriage return shaft, a gear wheel for dr1v1ng said carriage return shaft, a fr1ction. clutch for engaging said gear wheel with said second sleeve, a friction clutch for engaging said driving wheel with said first mentioned sleeve, and means for engaging said first mentioned sleeve with said driven shaft.

4. A- driving mechanism for calculating machines comprising in combination an actuating link for the calculating mechanism, an actuating shaft for the carriage return mechanism, aconstantly rotated armature shaft, a driving wheel actuated by said armature shaft, friction means for engaging said driving wheel to operate said link, and friction means for engaging said driving Wheel to operate said'iirst mentioned shaft.

5. A driving mechanism for calculating machines comprising a constantly rotated armature shaft, a driving wheel actuated by said shaft, a gear wheel for operating the carriage return shaft, a link for actuating the calculating mechanism, a sleeve free from said driving wheel, and a sleeve fixed tov said driving wheel, means for clutching said driving wheel to said free sleeve, and means for clutching said gear wheel to said fixed sleeve.

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this 5th day of August, 1911.

OTTO THIEME.

Witnesses:

' M. P. SMITH,

J. HUTTON. 

